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Printing Units and Thermal Printers

A technology of printing unit and pressing roller, applied in printing device, printing and other directions, can solve the problems of the gear box part and the gear cover being disengaged, the gear cover falling off, etc., and achieving the effect of preventing falling off

Active Publication Date: 2019-01-18
SEIKO INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the conventional printing unit, the engagement between the gear box part and the gear cover may be disengaged due to the deflection of the gear cover caused by the impact of falling or the load applied to the gear cover by a pressure roller or the like. open, the gear cover comes off from the gear case

Method used

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  • Printing Units and Thermal Printers
  • Printing Units and Thermal Printers
  • Printing Units and Thermal Printers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] Embodiments of the present invention will be described below based on the drawings.

[0022] figure 1 It is a perspective view of a thermal printer. Such as figure 1 As shown, the thermal printer 1 is configured to be able to print on recording paper P. As shown in FIG. The recording paper P is thermal paper that changes color when heated, and is suitable for printing various labels, receipts, tickets, and the like. The recording paper P is placed in the thermal printer 1 in a state of being wound into a roll paper R having a hollow hole, and a portion pulled out from the roll paper R is printed.

[0023] The thermal printer 1 has a housing 3 , a display unit 4 , a control unit 5 , and a printing unit 10 . The casing 3 is formed in a hollow box shape from a plastic or metal material such as ABS or a composite material of ABS and polycarbonate. The casing 3 has a rectangular parallelepiped main body 6 , and a roll paper storage portion 7 bent toward one side in the ...

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PUM

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Abstract

The invention provides a printing unit and a thermal printer. The printing unit includes: a pressure roller having a driven gear; a drive source for rotating the pressure roller around a predetermined axis; and a frame for supporting the pressure roller in a rotatable manner. The driving source is assembled; the reduction gear, which reduces the driving force of the driving source and transmits it to the driven gear; the thermal head, the thermal head is crimped on the outer peripheral surface of the pressure roller; the gear box part, the The gear case part in which the driven gear and the reduction gear are assembled and has an opening for assembling the reduction gear, and a gear cover that closes at least part of the opening of the gear case part is formed on the frame. In one part, the gear case part has a concave part which is recessed in a direction intersecting the axial direction of a predetermined shaft, and the gear cover has: a claw part which engages with the gear case part; and a convex part which engages with the gear The recessed part of the box part fits.

Description

technical field [0001] The present invention relates to a printing unit and a thermal printer. Background technique [0002] Conventionally, in the printing unit of a thermal printer, the pressure roller is rotated in a state where the recording paper is sandwiched between the pressure roller and the thermal head, and the printing surface of the recording paper is heated by the heating element of the thermal head while the recording paper is conveyed. Heating is performed to develop color on the printing surface and print. The pressure roller has a gear at one end of the shaft. The power of the motor installed on the frame of the printing unit is transmitted to the gear of the pressure roller through the reduction gear, so that the pressure roller rotates. [0003] The frame of the printing unit is provided with a gear case that accommodates the reduction gear and the gear of the pressure roller. The gear box part is formed with openings in consideration of the ease of as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41J2/32B41J29/12B41J2/315
CPCB41J2/315B41J2/32B41J29/12B41J29/02B41J29/38B41J11/04
Inventor 清野匠宫胁浩平
Owner SEIKO INSTR INC